How do I calculate Gross Profit Percentage (GPP) on goods I sell? [more inside]
posted by tomble on Sep 9, 2006 - 2 answers

Here's a question for the mathematically minded. A lot of the work I do involves rolling materials such as paper or plastic film onto rolls. Now, while I normally can guess by sight or weigh a roll to determine how much is on it, I got to wondering... [more inside]
posted by tomble on Apr 27, 2005 - 24 answers